.top{
    width: 70px;
    height: 70px;
    background-color: #fff02a;
    border-radius: 50px;
    position: fixed;
    bottom: 5%;
    right: 2%;
    z-index: 99;
    cursor: pointer;
    display: none;
}

.top i{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 24px;
    color: #111;
}